Difference between revisions of "Amniotic egg"
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| − | An amniotic egg is an egg which has a shell and can hold water. | + | An '''amniotic egg''' is an egg which has a shell and can hold water. The eggs can be, (given the animal and species), "hard" (rigid) or "soft" a tough (leathery) shell. While watertight, most shells are gas permeable. The shell allows [[reptile]], [[bird]], and some [[mammal]] [[embryo]]s to develop. |
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[[Category:Reproduction]] | [[Category:Reproduction]] | ||